Coating or enameling apparatus.



M. D. SHIVERIGK.

COATING 0R ENAMELING APPARATUS.

APPLICATION TILED 001224, 1908.

Patented May 11, 1909.

2 SHEETS-SHEET 1.

H I I HMHHGQWIH HHHH M. D. SHIVERICK.

COATING OR ENAMELING APPARATUS.

APPLIOATION FILED 001". 24, 1908.

921,292, Patented May 11, 1909.

Z SHEETS-SHEET 2.

WITHEEEES VE EIR UNITED STATES PATENT OFFICE.

MYRON D. SHIVERICK, OF ALBANY, NEW YORK, ASSIGNOR TO WILLIAM E. MILBANK,OF ALBANY, NEW YORK.

COATING OR ENALELING APPARATUS.

Specification of Letters Patent.

Patented May 11, 1909.

Application filed October 24,1908. Serial No. 459,309.

To all whom it may concern:

Be it known that I, MYRON D. SHIVERICK, a citizen of the United States,residing at Albany, county of Albany, New York, have invented a newanduseful Improvement in Coating or Enameling Apparatus, of which thefollowing is a specification.

M invention relates to an apparatus or mac 'ne for covering the surfacesof tubes, rods, lengths of wire or'like articles with japanned or bakedenamel. Such enameling is useful to protect the tubeor the like fromoxidation, or, particularly, to electricall insulate it. I

%he object of my invention is to cheaply and thoroughly coat the articlewith-a hard elastic covering, so that it may be bent without injury tosuch covering).

While my machine may e used to enamel articles of different sorts, andmay vary widely in its form, I will illustrate it as applied to thecoating of tubes.

In the drawings, Figure 1 is aside elevation of a preferred form of mydevice; Fig. 2 is a top plan view of the same; Fig. 3 is an enlargeddetail, in elevation and top plan, of the feed tube tip shown in Fig. 1;Fig. 4 is a top plan view of a modified form of my device; Fig. 5 is aside elevation .of another modification.

Referring first to Figs. 1, 2 and 3 of the drawings, 11 designates abase, on which are mounted bearings 12 and 13, which support a rod 15',threaded at one end to engage a tension screw 16, by which the rod 15 ismaintained in taut position. Also mounted on the base 11 is a drivingdevice, shown as a motor 17, which turns a friction wheel 18, againstwhich bears a second friction wheel 19, rotatable on the rod '15 andcarrying. a.

tube engaging device, shown as a chuck 20. The base 11 also carriesadjacent its opposite ends two pairs of standards 21, 22, which formbearings for pulleys 23, 24, on which runs a belt 25 of steel, iron orthe like. On the shaft 26 of one of the pulleys 23 isa fric tion wheel27, which is rotated by contact with the face of the wheel 18. Runningon a. track 28.011 the base 11 is a truck or carrier 29, which carriesthe baking oven 30, which consists of a closed box having apertures 31,32 at its 0 )posite ends for the passage of the rod 15 an the tubecarried thereon. In the oven 30 is an electric heating device,consisting of two parallel insulating rods 33 and a strip 34 of highresistance metal spirally wound thereon and connected with a suitablesource of electric energy. Mountedat the forward end of the carrier 29,closely adjacent the end of the heater oven 30' is a feeding device 35,consisting of a suitably supported receptacle 36, from which leads abent tube 37 carrying a tip 38, the mouth of which is in the form of anarrow elongated slot 39 see Fig 3. Also mounted on t e carrier 29 is anelectro-magnet 40, the poles of which contact, or practically contact,with the metal belt 25.

The operation of the machine just described is as followsfA tube 41 isslip ed over the rod or mandrel 15, which is then drawn taut, by thescrew 16, the tube being held by the chuck or like engaging device 20,with its free end contacting with the feed tip 39. The oven 30 beingreviously heated by current passing through the resistance 34, the motor17 is started. Through the action of the friction wheels 19 and 27 thetube 41, which is to be enameled, is rotated and the oven 30 is causedto traverse the base 11 from right to left of the drawing by switchingcurrent through the coils of the magnet 40, the oles of which thenadhere to the belt 25. At t e same time the stop er 42 in the receptacle36 is raised, so that the liquid or viscous enamel flows by gravity orby capillary action on to the lower side of the tube 41. In practice, Iprefer to make the slot 39 so narrow that the enamel does notspontaneously flow therefrom, but is retained by capillarity therein, sothat it is wiped off the tip 38 and on to the tube 41 by their movingcontact. As the tube is rotating and the tip 38 is being -movedlongitudinally thereof, the enamel will'bc apphed in a spiral to thetube.

It is obvious that the relative rates of movement of the tube and thecarrier 29 are so .arran .ed that the edges of the spirally depositeenamel meet or slightly overlap, whereby the entire surface of the tubeis covered. The enamel feeding device being in close juxtaposition tothe oven 30, the coated portion of the tube passes immediately into theoven through the aperture 31 and the baking operation begins.

When the oven has reached its final position, the tube is'completelenameled, when the motor 17 is stopped, t e magnet 40 cut out, thecarrier 29 run back, and the tube re-" moved from the mandrel 15, sothat the machine is ready for a second operation. It is clear that ifthe tube 41 were not placed on the rod 15, the rod itself, or any rodso, placed, could be enameled in like manner.

In the fourth figure of the drawings, I have omitted many parts whichare similar to the corresponding parts already described. The bearings52, 53 are adapted to carry. a plurality of rods 15, shown as arrangedside-byside, and each held taut, as before, by a setscrew 16. Each rodpasses freely through a chuck 20, adapted to engage a tube 41, slippedover the rod, the chucks being simul taneously rotated'by intermeshinggears 54, driven, as before, by a motor as 17. The carrier 29 supports anumber of feeding devices 35 corresponding to the tubes 41, here shownas five. In like manner, the oven 60 differs'from that first describedonly in having a corresponding plurality of apertures at each end topass the tubes 41. It is obvious that, except for its capacity, theoperation of the machine will be unchanged.

1 it is only necessary to the operation of my invention that the tube orother article to be coated should have a spiral, i. e., a combinedrotary and longitudinal, movement relative to the liquid feeding means,and a longitudinal, though preferablyspiral, movement through theheating chamber or oven, I have shown in Fig. 5 another modification ofmy machine. Standards 72, 73 support, as before, a rod 15 provided withtightening screw 16. The chuck 20, which holds the tube 41, is mountedat the end of a hollow lead-screw 75, these last-named three parts beingslipped over the rod 15. In the leadscrew 75 is cut a keyway 76, intowhich engages a key on the friction wheel 77, driven as before. Thewheel 77 is shown as held between the arms of a forked support 78, in atleast one 'arm of which the screw 75 is threaded. The feeding device 35,as well as the baking oven 79, is stationary and mount-' It is obviousthat the tube 41 will In this construction be ed directly on.the base11.

not therefore'wish to limit my invention, ex-' cept as set forth in theappended claims.

What I claim is: v 1. An enameling machine comprising means forsupporting and rotating an article to be enameled; a heating oven; andmeans for giving such article and said oven relative longitudinalmovement.

65 2. An enameling machine comprising means for su portin an article tobe enameled in a substantia ly horizontal position; means for rotatingsuch article; a heating oven; and means for giving such article and saidoven relative longitudinal movement.

3. An enameling machine comprising means for supporting and rotating anarticle to be enameled; an electrically heated oven; and means forgiving such article and said oven relative longitudinal movement.

4. An enameling machine comprising means for supporting and rotating anarticle to be enameled; a heating oven provided with apertures for thepassage ofsuch article therethrough; and means for moving said ovenlongitudinally of such article.

5.-- In an enameling machine, a heating oven; a carrier on whichsaidoven is mounted; a belt movable adjacent said carrier; and magneticmeans for detachably connecting said belt and said carrier for movingthe latter. Y

6. In an enameling machine, a heating oven; a carrier on which said ovenis mounted; a belt of magnetic metal movable adjacent said carrier; anda magnet mounted on said carrier for detachably connecting it with saidbelt.

7. In an enameling machine, means for supporting and rotating an articleto be enameled; means for applying -a liquid or viscous enamel to sucharticle; subsequently operative means for heating such articles; andmeans for giving such article and said applying means relativelongitudinal movement.

8. In an enameling machine, means for supporting an article to beenameled in a substantially horizontal position; means for rotating such"article; means for applying a liquid or viscous enamel to such articlesubsequently operative means for heating such articles; and means forgiving such article and said applying meansrelative longitudinalmovement.

9. In an enameling machine, means for supporting and rotating an articleto be enameled; means for applying a liquid or viscous enamel to sucharticle; and means for moving said applying means longitudinally of sucharticle.

10. In an enameling machine, means for supporting an article to beenameled; and means, including a narrow elongated feeding slot, forsupplyin a spiral coating of liquid or viscous ename to such article.

11. In an enameling machine, means for supporting an article to beenameled; and means, including a feeding tip supported beneath sucharticle, for supplyin a spiral coating of liquid or Viscous enamethereto.

12. An enameling machine comprising means for supporting and rotating anarticle to be enameled; enamel applying means; a heating oven; and meansfor giving such article longitudinal movement relatively to said aplying means and said oven.

13. in enameling machine comprising means for su porting and rotating anarticle to be ename ed; a carrier movable longitudinally of sucharticle; and enamel applying means and a heating oven mounted inuxtaposition upon said carrier.

14. An enameling machine comprising means for supporting an article tobe enameled; means for supplying a spiral coating of liquid' or viscousenamel to such article;

and a heating oven in juxtaposition to said coating means for bakingsuch enamel.

15. An enameling machine compris' means for supporting in arallelrelation an for rotating a plurality of articles tobe enameled; aheating oven; and means for giving such articles and said oven relativelongitudinal movement.

MYRON D. SHIVERICK. Witnesses:

Gno. L. COOPER, A. FAIBWEATHEB.

